condition mean min max ZT0-3 2.06607 2.06607 2.06607 ZT4-7 1.42663 1.42663 1.42663 ZT8-11 0.963589 0.963589 0.963589 ZT12-15 1.6258949999999999 1.6258949999999999 1.6258949999999999 ZT16-19 4.484955 4.484955 4.484955 ZT20-23 2.67342 2.67342 2.67342